201220102000 has 80 divisors (see below), whose sum is σ = 486702545472. Its totient is φ = 80462841600.

The previous prime is 201220101991. The next prime is 201220102037. The reversal of 201220102000 is 201022102.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7200054 + ... + 7227946.

Almost surely, 2^201220102000 is an apocalyptic number.

201220102000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201220102000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243351272736).

201220102000 is an abundant number, since it is smaller than the sum of its proper divisors (285482443472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201220102000 is a wasteful number, since it uses less digits than its factorization.

201220102000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31523 (or 31507 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 201220102000 its reverse (201022102), we get a palindrome (201421124102).

The spelling of 201220102000 in words is "two hundred one billion, two hundred twenty million, one hundred two thousand".